121111031331 has 8 divisors (see below), whose sum is σ = 179423750160. Its totient is φ = 80740687536.

The previous prime is 121111031303. The next prime is 121111031357. The reversal of 121111031331 is 133130111121.

121111031331 is a `hidden beast` number, since 1 + 211 + 110 + 313 + 31 = 666.

It is not a de Polignac number, because 121111031331 - 2⁹ = 121111030819 is a prime.

It is a super-2 number, since 2×121111031331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121111033331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242796850 + ... + 2242796903.

It is an arithmetic number, because the mean of its divisors is an integer number (22427968770).

Almost surely, 2^121111031331 is an apocalyptic number.

121111031331 is a deficient number, since it is larger than the sum of its proper divisors (58312718829).

121111031331 is an equidigital number, since it uses as much as digits as its factorization.

121111031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485593762 (or 4485593756 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 121111031331 its reverse (133130111121), we get a palindrome (254241142452).

The spelling of 121111031331 in words is "one hundred twenty-one billion, one hundred eleven million, thirty-one thousand, three hundred thirty-one".